I read somewhere that Steve said that the Taboo doesn't work with single-ended headphones unless it is in lucid mode. Does someone know what "doesn't work" means? I can play my Taboo in either mode although I do used lucid since it sounds better.

According to Steve, who I've talked to directly about this question, while you CAN play headphones with lucid mode turned off, the harmonics are going to be messed up because of grounding issues. Standard headphone jack connects the grounds from the two channels. For whatever reason, this fact makes it so it is necessary to use lucid mode if you want the sound to be right. You can use a balanced cable hooked up directly to the speaker posts for listening to headphones with lucid mode off.

Very interesting Don. I did not know that. I believe in the user manual, LM is treated as something you can choose between based on taste; this sounds more SQ than taste. Anyway, there is no question that the LM style of cross feed is sonically very rewarding for me. I have switched in and out on the LCD-2s, the Thunderpants, Terminator, and even my Jerry Harvey JH-13 IEMs, and no matter what, I prefer LM.